CVE-2018-7833: Schneider Electric Modicom BMXNOR0200H Firmware

High severity, CVSS 7.5. EPSS: 1.4% chance of exploitation in the next 30 days.

An Improper Check for Unusual or Exceptional Conditions vulnerability exists in the embedded web servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200 where an unauthenticated user can send a specially crafted XML data via a POST request to cause the web server to become unavailable

Affected products

• Schneider Electric Modicom BMXNOR0200H Firmware: any version
• Schneider Electric Modicom m340 Firmware: any version
• Schneider Electric Modicom Premium Firmware: any version
• Schneider Electric Modicom Quantum Firmware: any version

Published 2018-12-17. Last modified 2026-06-17.